Panel board



Feb. 14, 1939. w. H, FRANK ET AL 2,147,023

PANEL BOARD Original Filed May 13, 1935 2 Sheets-Sheet l 31,@ ww wwwwfww f @5? @@gwwl Fb. 14, 1939. w4 H. FRANK E-r AL 2,147,023

PANEL BOARD Original Filed May 13, 1935 2 Sheets-Sheet 2 f dwp M1141.; ATTORNEY.

Patented Feb. 14, 1939 UNITED STATES PATENT OFFICE PANEL BOARD William l1. Frank and Joseph W. Harper,

- Detroit, Mich.

l Claims.

This application relates to panelboards and is a division of application Serial No. 21,114 of May 13, 1935, now Patent #2,103,325, Dec. 28,

The panelboard hereof is shown in the appended drawings. In these drawings,

Figs. 1 and 2 are front and side views oi' a panelboard of the invention.

Fig. 3 is a section on line 3-3 of Fig. 1;

Figs. 4 and 5 are detail views.

Figs. 1 to 5 show a wall mounted panelboard formed of a steel cabinet 88 having openings 8| in its iront wall 8|a and containing a bus duct 82 of the character shown in Patent No. 2,041,675 of May 19, 1936, the latter having in its iront wall openings C3 aligned with those of the front wall of the cabinet. The spaces 8l between the sides of the duct and the sides of the cabinetA form gutters for branch circuit conductors 85 whose terminals are connected to removable branch circuit control plugs 86 of various types, the conductors entering the plugs through side openings |88. For example, the plugs 86A may be of lthe switching type shown in Patent No. 2,059,987 of November 3, 1936; plugs 86B may be oi the circuit breaker type shown in application Serial No. 48,502 of November 6, 1935; plugs 86C may be of the switching type shown in Patent No. 2,088,105 of July 27, 1937.

The plugs are in the nature of open backed steel boxes containing connectors for terminals oi' the branch circuit conductors 85 and having back projecting prongs 81 which may be projected through the holes 83 of the duct when the plugs are disposed within the front holes of the cabinet front, the prongs thus engaging the bus bars 88 within the duct.

It will be understood that when the plugs are not in place on the d'uct, the interiors of the 40 plugs and the holes of the duct are exposed; however, when the plugs are within the cabinet holes and their side extensions 89 are fastened to the duct by suitable fastening means 90, the

the holes u of the cabinet front, and at the same time the duct seals the open backs of the plugs,

gaskets being provided atthe back edges of the plugs to help establish such seals.

'Ihe front oi' the cabinet is referenced 8|a and in this front are the holes 8| lled by the plugs Il when the plugs are in place. Behind this front are the gutters 8l for the branch circuit conductorsl 88 which enter the plugs through u holes |88 in the sides thereof so located as to plugs seal the holes 8l of the ductand also lillV be within the cabinet and concealed by the cabinet front when the plugs are on the duct.

Within the cabinet and above the upper end of the duct isa space 9| into which project 'the upper ends of the bus bars 88 of the duct whereby these may be connected to the termini of the main feed conductors 92 contained within the conduit 93.

On the fronts of the plugs are handles 94 for permitting manipulation of the switches and circuit breakers formed as parts of the` plugs'.

On the duct are mounted covers 95 which may be moved to open or close the holes 83.

Now having described the panelboard, reference will be had to the claims which follow ior 1f a determination of the monopoly sought herein.

We claim:

1. A panelboard comprising a cabinet having openings in its front wall, a bus duct within the cabinet having openings alined with those of the cabinet, there being gutters or spaces between the sides of the duct and the sides oi the cabinet, removable plugs disposed in and nlling the cabinet openings and having on their backs prongs disposed within the duct openings, the plugs having openings therein so located as to 25 be within the cabinet and concealed by the cabinet front when the plugs are on the duct, and load conductors within the gutters and entering the plugs through their side openings.

2. A panelboard comprising a cabinet having openings in its front wall, a bus duct within ,the cabinet having openings .alined with those of the cabinet, there being gutters or spaces between the sides of the duct and the sides of the cabinet, removable plugs disposed in and illling the cabinet openings and having on their backs prongs disposed within the duct openings, the plugs having openings therein so located as to be within the cabinet and concealed by the cabinet front when the plugs are on the duct, and load conductors within the gutters and entering the plugs throughitheir side openings, the fronts of the plugs having thereon handles for manipulating switches within the plugs.

3. A panelboard comprising a cabinet having openings in its front'wall, a bus duct within the cabinet having openings alined with those of the cabinet, there`being gutters or spaces betwen the sides ofthe duct and the sides oi the cabinet, removable plugs disposed in and filling the cabinet openings and having on their backs prongs disped within the duct openings, the plugs having openings therein so located as to be within the cabinet and concealed by the cabifin f em i ui?.

A. pehelhoard comprising e oebnet having openings in its front well, e, bus duct Within the cabinet having openings elined with those o the cabinet, there being gutters or spaces between the sides of the duct and the sides o; vthe cabinet, removable plugs disposed in and lling the cabinet openings and having on their backs prongs disposed within the duct openings, the plugs having openings therein so located es to he within the cabinet and concealed by the cabinet iront when the plugs are on *the duet, and load conductors within the gutters and enteiing the plugs through their side openings, and means for seeming the plugs directly to the duct.

5. Fenelooerds comprising cabinets having openings in their iront weils, bus ducts Within the cabinets having openings aimed with those o the cabinets, there heilig gutters or spaces between the sides o1" the ducts end the sides of the cabinets, removable pings disposed'in and iii the cabinet openings and heaving on their hesse prongs disposed within the duct openings, the pugs having openings theyein so iooeted es to se Within the cabinets and concealed by the eesiiiet i'onts when the plugs are on the ducts, end ioad conductors within the gutters end ehn toting the plugs through their side openings.

posed filling the cabinet openings end hevieg hacks prongs disposed within the sloot openings, the plugs hevingA openings therein so iooeted as to be within the' cabinets end conceal-ed by the 1c cabinet fronts when the plugs are on the ducts, and load conductors Within the gutters and entering the plugs through their side openings, the backs of the plugs being normally open and sealed hy the engagement of the heck edges o 15 the plugs with the ducts.

7. Psnelboards comprising cabinets hsv/img openings in theirroit weils, Tous duets Within the cabinets having openings eiined with those of the cabinets, there heiss gutters os speces he- 20 tween the sides of the ducts sied the sides of the cabinets, removs'ole plugs disposedie. end filling the eebmet openings one. hevog es theii bec'ss prongs disposed within the duct ogeeiii'lgs. l the plugs having openings theeie so located e he within the cabinets end concealed 'og 'the c :oet fronts when the plugs ere on the duets, end ioao conductors within the gutters etici eetex'ing the plugs through their side openings, enel meses for securing the plugs directly to the duets. 

